Voyager 2 is Still Talking to Us

Posted on by onespaceman2000
Image (Credit): Artist’s rendering of Voyager 2. (NASA)

After two weeks with no word, Voyager 2 is back to communicating with us as it continues its journey beyond our solar system. The whole incident started when NASA sent a bad command, but all is well.

Voyager 2 first left Earth back in August 1977 and exited the solar system in December 2018. Like Voyager 1, which is also outside the solar system now, Voyager 2 had the initial task of studying the planets. Voyager 2 focused on Jupiter, Saturn, Uranus and Neptune. It has shown it was capable of much more as it dragged the human race to the bleeding edge of space.

You can read all about Voyager 2’s accomplishments at this NASA site, including:

  • Voyager 2 is the only spacecraft to study all four of the solar system’s giant planets at close range.
  • Voyager 2 discovered a 14th moon at Jupiter.
  • Voyager 2 was the first human-made object to fly past Uranus.
  • At Uranus, Voyager 2 discovered 10 new moons and two new rings.
  • Voyager 2 was the first human-made object to fly by Neptune.
  • At Neptune, Voyager 2 discovered five moons, four rings, and a “Great Dark Spot.”

An impressive list of accomplishments, and the spacecraft is still ticking as it goes into the great unknown.

We need to keep these achievements in mind as we battle over this year’s NASA budget. We also need to remember that there was supposed to be four Voyager-like spacecraft rather than two, but budget cuts nixed the second set. Meaning we can still get some great things done even if we don’t have the budget to fund every piece of a grand vision.

Movie: The Story of Carl Sagan

Posted on by onespaceman2000
Image (Credit): Dr. Carl Sagan. (NASA)

Have you heard about the upcoming movie about Carl Sagan called Voyagers? Andrew Garfield of Spiderman fame will be playing Dr. Sagan. Daisy Edgar-Jones will play the part of Ann Druyan. The new film will be one of many shown at this year’s Cannes Film Festival, starting next week.

Here is the basic outline of the film by The Hollywood Reporter:

The film is set in 1977 as NASA is preparing to launch humanity’s first interstellar probes, the Voyager 1 and Voyager 2 missions. A team, led by Sagan, sets out to create a message to accompany them: the Golden Record, a group of images and sounds meant to express the essence of humanity and act as a first-contact greeting for any galactic lifeforms the probes might reach. But what starts out as a race-against-the-clock mission becomes an epic, unexpected love story between Sagan and his collaborator Druyan.

I have seen Andrew Garfield in a number of films and TV shows, and he never disappoints. Seeing his take on Dr. Sagan’s story should be fascinating and fun.

With all the recent films and series on twisted business icons, I will be happy to take a break and watch a film that covers one of science’s great icons. Maybe it can encourage a new generation of scientists and supporters of science.

Podcast: Solar Sailing to the Stars

Posted on by onespaceman2000
Image (Credit): NEA Scout sail fully deployed. (NASA)

On a recent episode of the Clear + Vivid podcast, Alan Alda interviewed NASA engineer Les Johnson about his efforts to develop a solar sail that can take us to the stars. He is the Principal Investigator for the NEA Scout, which was launched into space during the Artemis I mission and is now heading towards a near-Earth asteroid via solar sails (see above).

During the interview, Mr. Johnson discussed the NEA Scout as well as his hopes for future human travel to the stars using solar sails, noting that while slow, the sails can outperform modern rocket engines in the long-run. He also pointed out that a solar sail may be able to get us to Proxima Centauri, the closest neighboring star, in hundreds of years versus the 70,000 years it will take the Voyager spacecraft to travel that same distance. I like how he puts such a mission in perspective, pointing out it took hundreds of years to build some of the great cathedrals.

Messrs. Alda and Johnson also discussed the ethics of space travel considering astronauts will be spending generations in space with many humans never seeing either the Earth or the destination in their lifetime. Mr. Johnson said space lasers may be another option for interstellar travel at some point in the future, reducing the travel time to Proxima Centauri to 40-50 years. Given the time spans, he said it may make sense to initially send robots into space first.

Finally, the podcast covered missions closer to Earth, such as mining asteroids for water and minerals, as well as 3D printing to create what we need in space. It sounded a lot like the situation in find in the science fiction TV series The Expanse.

Overall, it was a great conversation worth a few minutes of your day. Check it out.

Extra: Mr. Johnson is also the author of several books, including the co-authored Saving Proxima. Here is a quick summary of that tale:

2072. At the lunar farside radio observatory, an old-school radio broadcast is detected, similar to those broadcast on Earth in the 1940s, but in an unknown language, coming from an impossible source—Proxima Centauri. While the nations of Earth debate making first contact, they learn that the Proximans are facing an extinction-level disaster, forcing a decision: will Earth send a ship on a multiyear trip to render aid? 

Interstellar travel is not easy, and by traveling at the speeds required to arrive before disaster strikes at Proxima, humans will learn firsthand the time-dilating effects of Einstein’s Special Relativity and be forced to ponder ultimate questions: What does it mean to be human? What will it take to share the stars with another form of life? What if I return younger than my own children? The answers are far from academic, for they may determine the fate of not one, but two, civilizations.

Credit: Baen Publishers

A Day in Astronomy: The Birth of Carl Sagan

Posted on by onespaceman2000
Image (Credit): Astrobiologist Carl Sagan. (Nautilus.us)

On this day in 1934, scientist and communicator Carl Edward Sagan was born in Brooklyn, NY. He was to become a great communicator of all things related to astronomy. He has played a key role over the years introducing millions to our place in the universe through his books, television series, speeches, and scientific work. His television series Cosmos was a milestone in educational television, bringing the stars and planets into everyone’s living room, while his books (Contact, Pale Blue Dot, The Dragons of Eden) continue to encourage the next generation of astronomers.

Dr. Sagan has a long resume, but I am most fascinated with his work to communicate with extraterrestrial life. He was a strong supporter of the Search for Extra-Terrestrial Intelligence (SETI) and worked with NASA to ensure our spacecraft were equipped with a record of human activity to educate other planetary civilizations, including the gold records placed on the Pioneer 10 and 11 space probes as well as the two Voyager space probes.

Years ago, the Smithsonian magazine had a good summary of Dr. Sagan’s life in the article “Why Carl Sagan is Truly Irreplaceable.” I recommend the article as a good way to get to know the man, though delving into his books is even better.

Credit: Ballantine Books

Extra: Carl Sagan was also the founder and first president of the Planetary Society. Visit this Planetary Society site, Ann Druyan wishes you a happy Sagan Day, for more on Dr. Sagan’s work.

RIP: Astronomer Frank Drake

Posted on by onespaceman2000
Image (Credit): Photo of Frank Donald Drake. (SETI Institute)

We lost a grand mind last Friday with the death of astronomer Frank Drake at the age of 92 (1930 – 2022).

In addition to giving us the famous Drake Equation pertaining to the potential existence of extraterrestrial intelligence in our galaxy, he spent his life looking for signs that we are not alone and served as the president of the SETI Institute as well as director of the SETI Institute’s Carl Sagan Center for the Study of Life in the Universe. Among many other things, he also worked with Carl Sagan on the “Golden Record” placed in the Voyager spacecraft.

One thing that comes across from interviews is that he was a very hopeful man who did not tire easily. In an earlier interview with Space.com, he shared this unique view of our space neighbors:

That reminds me of something else. We have learned, in fact, that gravitational lensing works. If they [aliens] use their star as a gravitational lens, they get this free, gigantic, super-Arecibo free of charge. They are not only picking up our radio signals, but they have been seeing the bonfires of the ancient Egyptians. They can probably tell us more about ourselves than we know … they’ve been watching all these years.

You can watch Mr. Drake discuss gravitational lens and more in this earlier lecture on YouTube. You can also learn much more about Mr. Drake’s career and activities at FamousScientists.org.

Image (Credit): The Voyager Golden Record cover shown with its extraterrestrial instructions. (NASA/JPL)